/*
 * Copyright (C) 2016 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.priyankvasa.android.cameraviewex

import org.hamcrest.CoreMatchers.either
import org.hamcrest.Description
import org.hamcrest.Factory
import org.hamcrest.Matcher
import org.hamcrest.TypeSafeMatcher

class AspectRatioIsCloseTo(private val ratio: AspectRatio) : TypeSafeMatcher<AspectRatio>() {

    override fun matchesSafely(item: AspectRatio): Boolean {
        val other = item.toFloat()
        val self = ratio.toFloat()
        return self - ERROR < other && other < self + ERROR
    }

    override fun describeTo(description: Description) {
        description.appendText("an aspect ratio of ").appendValue(ratio.toString())
    }

    companion object {

        private const val ERROR = 0.01f

        @Factory
        fun closeTo(ratio: AspectRatio): Matcher<AspectRatio> {
            return AspectRatioIsCloseTo(ratio)
        }

        @Factory
        fun closeToOrInverse(ratio: AspectRatio): Matcher<AspectRatio> {
            return either(closeTo(ratio)).or(closeTo(ratio.inverse()))
        }
    }
}